<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>品牌列表案例</title>
  <link rel="stylesheet" href="./lib/bootstrap.css">
  <link rel="stylesheet" href="./css/brandlist.css">
</head>

<body>

  <div id="app">
    <!-- 卡片区域 -->
    <div class="card">
      <div class="card-header">
        添加品牌
      </div>
      <div class="card-body">
        <!-- 添加品牌的表单区域 -->
        <!-- form 表单元素有 submit 事件 -->
        <form @submit.prevent="add">
          <div class="form-row align-items-center">
            <div class="col-auto">
              <div class="input-group mb-2">
                <div class="input-group-prepend">
                  <div class="input-group-text">品牌名称</div>
                </div>
                <input type="text" class="form-control" placeholder="请输入品牌名称" v-model.trim="brand">
              </div>
            </div>
            <div class="col-auto">
              <button type="submit" class="btn btn-primary mb-2">添加</button>
            </div>
          </div>
        </form>
      </div>
    </div>

    <table class="table table-bordered table-hover table-striped">
      <thead>
        <tr>
          <th scope="col">#</th>
          <th scope="col">品牌名称</th>
          <th scope="col">状态</th>
          <th scope="col">创建时间</th>
          <th scope="col">操作</th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="item in list" :key="item.id">
          <td>{{item.id}}</td>
          <td>{{item.name}}</td>
          <td>
            <div class="custom-control custom-switch">
              <input type="checkbox" class="custom-control-input" name="" :id="'cb'+item.id" v-model="item.status">
              <label class="custom-control-label" :for="'cb' + item.id"  v-if="item.status">已启用</label>
              <label class="custom-control-label" :for="'cb' + item.id"  v-else>已禁用</label>
            </div>
          </td>
          <td>{{item.time}}</td>
          <td>
            <a href="javascript:;" @click="remove(item.id)">删除</a>
          </td>
        </tr>
      </tbody>
      </table>
      </div>

    <script src="./lib/vue-2.6.12.js"></script>
    <script>
      const vm=new Vue({
        el:'#app',
        //品牌的列表数据
        data:{
          //用户输入的品牌名称
          brand:'',
          //nextId 是下一个可用的id
          nextId:4,
          list:[
          {id:1,name:'宝马',status:true,time:new Date()},
          { id: 2, name: '奔驰', status: false, time: new Date() },
          { id: 3, name: '奥迪', status: true, time: new Date() },
          ]
        },
        methods: {
          //点击链接，删除对应的品牌信息
          remove(id){
            this.list=this.list.filter(item=>item.id!==id)
          },
          //阻止表单的默认提交行为之后，触发add方法
          add(){
            //如果判断到brand的值为空字符串，则return出去
            if(this.brand=='') return alert('必须填写品牌名称')
            //如果没有被return出去，应该执行添加的逻辑
            //先把要添加的品牌对象整理出来
            const obj={
              id:this.nextId,
              name:this.brand,
              status:true,
              time:new Date()
            }
            //往this.list数组中push步骤1中得到的对象
            this.list.push(obj)
            //清空this.brand 让this.nextId自增+1
            this.brand=''
            this.nextId++
          }
        },
      })
    </script>
</body>

</html>